Modulating control valve with magnetic actuator PN16

Transcription

1 4 466 ACVATIX Modulating control valve with magnetic actuator PN16 stainless steel MX462S.. se Short positioning time (< 2 s), high-resolution stroke (1 : 1000) Selectable valve characteristic: equal-percentage or linear High rangeability Operating voltage AC / DC 24 V Selectable standard signal inputs DC 0/ V or DC 0/ ma DC 0 20 V Phs phase-cut signal input for Staefa controllers Indication of operating state, visible from the outside Wear-free inductive stroke measurement Low friction, robust and maintenance-free Spring return facility: A AB closed when de-energized Positioning control, position feedback and manual control Parts in contact with medium in CrNi steel Applications with demineralized water upon request The control valves MX462S.. are mixing or through-port valves. They are supplied with the magnetic actuator ready fitted, equipped with an electronics module for position control and position feedback. The short positioning time, high resolution and high rangeability make these valves ideal for modulating control of open and closed circuits with the highest control requirements. CE2N4466en Building Technologies

2 Type summary Type reference DN Connection k VS Χp max Χp S Operating voltage Positioning Spring return function [inch] [m 3 /h] [kpa] [kpa] signal time MX462S ¾B AC 24 V DC V DC 0/ V or DC 0/ ma < 2 s DN = Nominal size k vs = Nominal flow rate of cold water (5 to 30 C) through the fully opened valve (H 100) at a differential pressure of 100 kpa (1 bar) Χp max = Maximum permissible differential pressure across the valve s control path, valid for the entire actuating range of the motorized valve (mixing: path A-AB, B-AB) Χp S = Maximum permissible differential pressure at which the motorized valve will close securely against the pressure (close off pressure) Accessories Type reference Z366 Description Stem heating element for media temperatures < 0 C, AC / DC 24 V, 10 W Ordering Valve body and magnetic actuator form one assembly and cannot be separated. Example: Delivery When placing an order, please specify the quantity, product description and type code. Type reference Stock number Description Quantity MX462S50-30 MX462S50-30 Modulating control valve with magnetic actuator 2 Z366 Z366 Stem heating element 2 A CrNi-steel seal disc is part of the delivery. nion fittings and gaskets must be supplied by the installer. The Z366 stem heating is delivered in a separate package. Rev. no. Replacement electronics module ASE12 Overview table, see page 12. Should the valve electronics prove faulty, the electronics module must be replaced by the ASE12 replacement electronics module. Mounting instruction no is included. Technical and mechanical design For a detailed description of operation, refer to data sheet CA1N4028E. Control operation The electronics module converts the positioning signal to a phase-cut power signal which generates a magnetic field in the coil. This causes the armature to change its position in accordance with the interacting forces (magnetic field, counter spring, hydraulics). The armature responds rapidly to any change in signal, transferring the corresponding movement directly to the valve plug, enabling fast changes in load to be corrected quickly and accurately. The valve s position is measured continuously (inductive). The internal positioning controller balances any disturbance in the system rapidly and delivers the position feedback signal. The valve stroke is proportional to the positioning signal. Control The magnetic actuator can be driven by a Siemens controller or a controller of other manufacture that deliver a Dc V, DC 2 10 V, DC ma or DC 4 20 ma output signal. To achieve optimum control performance, it is recommended to use a 4-wire connection. In case of DC power supply, a 4-wire connection is mandatory! Spring return facility 2/12 If the positioning signal is interrupted, or in the event of a power failure, the valve s return spring will automatically close control path A AB

3 Manual control MANAL By pressing (a) and turning (b) the hand wheel in: clockwise (CW) direction, control path A AB can be mechanically opened to between %. Man b a Auto Off b By pressing (a) and turning (b) the hand wheel in: counterclockwise (CCW) direction, the actuator will be switched off and the valve closed. As soon as the hand wheel is pressed and turned, neither the forced control signal Z nor the input signal Y or the phase-cut signal acts on the actuator. The green LED will flash. 4461Z12 ATO For automatic control, the hand wheel must be set to the Auto position. The green LED will be lit. Operator controls and indicators in the electronics housing LED for indication of operating stat green ok calib. / Man error calib. 4461Z red error 4 Y M Z V Phs 2 Opening for auto calibration 3 DIL switch for mode control V mA V V V mA V 4 Connection terminals Configuration DIL switches V mA V Switch Function / Description [ma] Positioning signal Y [V] 1) V V mA V Positioning range Y and V, ma V, ma 1) 3 Valve characteristic V. lin (linear) 1) V. log (equal-percentage) 1) Factory settings 3/12

4 Selection positioning signal and range Y Voltage and current Y V V ma ma 4461Z22 Selection positioning range Y and : V / 0 20 ma or V / ma Ri > 500 ς V V Output signal (position feedback signal) is dependent on the load resistance Ri. Ri > 500 ς, voltage signal Ri < 500 ς, current signal Ri < 500 ς ma ma 4461Z23 Selection valve characteristics Equal-percentage or linear V. V. Y Y 4461Z24 Forced control input Z Z - function no function fully open closed Transfer Connections Function Z is not connected The valve will follow the Y- signal or phase-cut signal Z connected to The valve will fully open via control path A AB Z connected to 0 The valve will close via control path A AB Signal priority 1. Hand wheel position Man (open) or Off 2. Forced control signal Z 3. Phase-cut signal 4. Signal input Y 4/12

5 Calibration If the electronics module is replaced or the actuator turned through 180, the valve s electronics must be recalibrated. For that, the hand wheel must be set to Auto. The printed circuit board has a slot (position 3, preceding page). Calibration is made by bridging the contacts located behind the slot using a screwdriver. The valve will then travel across the full stroke to store the end positions. While calibration is in progress, the green LED will flash for about 10 seconds (also refer to «Indication of operating state») Indication of operating state LED Indication Function Remarks, troubleshooting reen Lit Control mode Normal operation; everything o.k. Flashing Calibration In manual control Red Lit Calibration error Internal error Flashing Mains fault DC Supply - / + Both Dark No power supply Electronics faulty Wait until calibration is finished (green or red LED will be lit) Hand wheel in Man or Off position Recalibrate (bridge contacts behind the calibration slot) Replace electronics module Check mains network (outside the frequency or voltage range) DC supply + / - connection rectify Check mains network, check wiring Replace electronics module Sizing Flow chart Χp v100 = differential pressure across the fully open valve and the valve s control path by a volumetric flow V 100 V100 = volumetric flow with valve fully open (H 100) Χpmax = maximum permissible differential pressure across the valve s control path, valid for the entire actuating range of the motorized valve (mixing: path A-AB, B-AB) 100 kpa = 1 bar 10 mwc 1 m 3 /h = l/s water at 20 C 5/12

6 Valve characteristic Equal percentage Linear Volumetric flow Volumetric flow [%] [V] 10 [V] 20 [ma] y4455d02 y y [%] [V] 10 [V] 20 [ma] y4455d03 y y Positioning signals Positioning signals Connection type 1) 4-wire connection The 4-wire connection should always be given preference! Type S NA P MED S TR P TR I F wire cross-section [mm 2 ] reference [VA] [W] [VA] [W] [A] max. cable length L [m] MX462S S NA = nominal apparent power P med = typical power consumption in the application S TR = Minimal apparent transformer power P TR = Minimum DC supply output I F = Minimal required slow fuse L = max. cable length; with 4-wire connections, the max. permissible length of the separate 1.5 mm 2 copper positioning signal wire is 200 m 1) All information at AC 24 V or DC 24 V Engineering notes Attention Conduct the electric connections in accordance with local regulations on electric installations as well as the internal or connection diagrams. Safety regulations and restrictions designed to ensure the safety of people and property must be observed at all times! In open circuits, there is a risk of valve disc seizing caused by scale deposits. Additionally, periodic actuation (twice or three times per week) must be planned. With closed and open circuits always use a strainer upstream of the valve to increase the valve's functional safety. Mounting notes Orientation Caution The valve is supplied complete with Mounting Instruction no The valve may only be used as a mixing or through port valve, not as a diverting valve. Observe the direction of flow A AB! Degree of protection valid only when M20 cable gland IP31 IP31 supplied by the installer. 4461Z16 When used as a through port valve 6/12 Only three-way MX462S.. valves are supplied. They may be used as straight-through valves by closing off port «B».

7 Threaded valves MX462S.. as throughport valves Close off port B with a union fitting. A Cr-Ni-Stahl seal disc with 3 gaskets is part of the delivery. nion fittings conforming to ISO 49 / DIN 2950 must be supplied by the installer. A B AB 4461Z15 Installation notes The MX462S.. valves are flat-faced allowing sealing with the gaskets provided. Do not use hemp for sealing the valve body threads. The actuator may not be lagged. For electrical installation, refer to «Connection diagrams», page 10. Maintenance notes The valves are maintenance-free. The low friction and robust design make regular servicing unnecessary and ensure a long service life. The valve stem is sealed from external influences by a maintenancefree gland. If the red LED is lit, the electronics must be recalibrated or replaced. Repair Should the valve electronics prove faulty, the electronics module must be replaced by the ASE12 replacement electronics module (refer to Mounting Instruction no ). Caution Always disconnect power before fitting or removing the electronics module. After replacing the electronics module, calibration must be triggered in order to optimally match the electronics to the valve (refer to «Calibration», page 5) Disposal The device is considered electrical and electronic equipment for disposal in terms of the applicable European Directive and may not be disposed of as domestic garbage. Dispose of the device through channels provided for this purpose. Comply with all local and currently applicable laws and regulations. Warranty Application-specific technical data must be observed. If specified limits are not observed, Siemens will not assume any responsibility. 7/12

8 Technical data Functional actuator data Power supply Extra low-voltage only (SELV, PELV) AC 24 V Operating voltage 8/12 Frequency AC 24 V 20% (SELV) or AC 24 V class 2 (S) Hz Typical power consumption P MED 22 W Stand by < 1 W (valve closed) Apparent power S A 65 VA Minimum power of transformer S TR 100 VA Required fuse I F 6.3 A, slow External supply line protection Fuse slow max. 10 A or Circuit breaker max. 13 A Characteristic B, C, D according to EN or Power source with current limitation of max. 10 A DC 24 V Operating voltage DC V Current draw at DC 24 V 0.5 A / 4 A (max.) Input Positioning signal Y DC 0/ V or DC 0/ ma or Phase Cut signal Phs 0 20 V Impedance DC 0/ V 100 kς // 5nF DC 0/ ma 240 ς // 5nF Forced control Z Impedance 22 kς Close valve (Z connected to 0) < AC 1 V; < DC 0.8 V Open valve (Z connected to ) > AC 6 V; > DC 5 V No function (Z not wired) phase-cut- or positioning signal Y active Output Position feedback signal Voltage DC 0/ V; load resistance > 500 ς Current DC 0/ ma; load resistance 500 ς Stroke measurement Nonlinearity Inductive ± 3 % of end value Positioning time Positioning time < 2 s Electrical connections Cable entry point 2 x 20.5 mm (for M20) Connecting terminal terminal for 4 mm 2 wire Min. wire cross-section 0.75 mm 2 Max. cable length refer to «connection type», page 5 Functional valve data PN class PN 16 as per EN 1333 Permissible operating pressure 1) 1.6 MPa (16 bar) Differential pressure Χpmax / Χp S refer to table «Type summary», page 2 Valve characteristic 2) equal percentage or linear, n gl = 3 as per VDI / VDE 2173, optimized near the closing point (refer to Data Sheet N4023) Leakage rate at Χp = 0.1 MPa (1 bar) A AB < 0.05 % of k VS value B AB < 0.2 % k VS depending on operation conditions Permissible media chilled, cold and hot water, water with antifreeze, demineralized water upon request 7) (super-clean water, desalinated water, VE water, osmosis water, deionized water) recommendation: water treatment as per

9 VDI 2035 Medium temperature 3) C Stroke resolution ΧH / H : 1000 (H = stroke) Mode of operation modulating Hysteresis typical 3 % Position when de-energized A AB closed Mounting position upright to horizontal (observe safety standard) Mode of operation modulating Materials Valve body, Covering flange CrNi steel (1,4409) Seat, inner valve, plug CrNi steel Entire inner suit CrNi steel Valve stem seal EPDM (O-ring) Dimensions / weight Dimensions / weight refer to «Dimensions», page 12 Threaded connection as per ISO Standards, directives and approvals Electromagnetic compatibility (Application) For use in residential, commerce and lightindustrial environments Product standard EN60730-x Automatic electrical controls for household and similar use E Conformity (CE) CA2T ) RCM Conformity A5W ) EAC Conformity Eurasia Conformity for all MX.. Protection class Class III as per EN Emissions Class 2 as per EN Housing protection upright to horizontal IP31 as per EN Vibration 5) IEC (1 g acceleration, Hz, 10 min) L certification (S) L 873, CSA certification C22.2 No. 24, Environmental compatibility The product environmental declaration contains data on environmentally compatible product design and assessments (RoHS compliance, materials composition, packaging, environmental benefit, disposal). Pressure Equipment Directive PED 2014/68/E Pressure accessories Scope: Article 1, section 1 Definitions: Article 2, section 5 Fluid group 2 DN 50 without CE-marking as per article 4, section 3 (sound engineering practice) 6) 1) 2) 3) 4) 5) 6) 7) Tested at 1.5 x PN (24 bar), similar to DIN Can be selected via DIL switch. Medium temperatures < 0 C, the Z366 stem heating element is required. The documents can be downloaded from In case of strong vibrations, use high-flex stranded wires for safety reasons. Valves where PS x DN < 1000, do not require special testing and cannot carry the CE label. The application with demineralized water may result in premature valve wear. Please contact your local Siemens office to determine the optimum use for the valve. 9/12

10 eneral environmental conditions Operation EN Transport EN Storage EN Climatic conditions Class 3K5 Class 2K3 Class 1K3 Temperature C C C Humidity % r.h % r.h % r.h. Mechanical conditions EN Class 6M2 Connection terminals System neutral AC 24 V, DC V System potential AC 24 V, DC V Control signal DC 0/2 10 V, DC 0/4 20 ma Measuring neutral (= 0) Position feedback signal DC 0/2 10 V, DC 0/4 20 ma Forced- control input Z Phase-cut signal DC V Phs, interchangeable, galvanically isolated Phase-cut signal DC V Phs, interchangeable, galvanically isolated Connection diagrams Caution Caution If controller and valve receive their power from separate sources, only one transformer may be earthed on the secondary side. In case of DC power supply, a 4-wire connection is mandatory! Terminal assignment for controller with 4-wire connection (to be preferred!). DC V DC V DC ma DC ma Common Transformer Separate Transformer 10/12

11 Terminal assignment for controller with 3-wire connection DC V DC V DC ma DC ma Common Transformer Separate Transformer Indication of valve position (only if required). DC V % volumetric flow V 100 Twisted pairs. If the lines for AC 24 V power supply and the DC V (DC V, DC ma) positioning signal are routed separately, the AC 24 V line need not be twisted. Warning Piping must be connected to potential earth! Controllers with phase-cut DC V Phs Common Transformer Separate Transformer Stem heating element Z366 2 AC/DC 24 V power supply for heating element 4 Power supply, positioning signals 11/12

12 Dimensions Dimensions in mm Type reference DN Rp L1 L2 L3 * H E F kg 1) [Inch] [Inch] [mm] [mm] [mm] [mm] [mm] [mm] [kg] MX462S ¾B Rp , ,6 Externally thread...b as per ISO Internally thread Rp... as per ISO 7-1 nion fittings as per ISO 49 / DIN 2950 * When used as through port valve Weight in kg (incl. packaging) Revision numbers Type reference MX462S A Valid from rev. No. Issued by Siemens Switzerland Ltd Building Technologies Division International Headquarters ubelstrasse Zug Switzerland Tel /12 Siemens Switzerland Ltd, 2005 Technical specifications and availability subject to change without notice.